| article html file updated | 31 August 2025 06:55 CEST | Update | https://www.mdpi.com/2223-7747/9/1/6 |
| article html file updated | 21 August 2025 23:34 CEST | Update | N/A |
| article html file updated | 19 July 2022 21:21 CEST | Update | N/A |
| article html file updated | 14 February 2020 19:53 CET | Update | N/A |
| article html file updated | 5 February 2020 12:45 CET | Update | N/A |
| article html file updated | 21 December 2019 05:08 CET | Original file | N/A |
| article pdf uploaded. | 21 December 2019 05:06 CET | Updated version of record | https://www.mdpi.com/2223-7747/9/1/6/pdf |
| article xml uploaded. | 21 December 2019 05:06 CET | Update | https://www.mdpi.com/2223-7747/9/1/6/xml |
| article xml file uploaded | 21 December 2019 05:06 CET | Update | N/A |
| article pdf uploaded. | 18 December 2019 16:34 CET | Version of Record | https://www.mdpi.com/2223-7747/9/1/6/pdf-vor |
| article xml file uploaded | 18 December 2019 16:34 CET | Original file | N/A |
